code: def test_length(self) -> None:
      for sampler in self.samplers:
          self.assertEqual(len(sampler), 10)
      for dataloader in self.dataloaders:
          self.assertEqual(len(dataloader), 10)
  
file_path: opacus/opacus/tests/distributed_poisson_test.py
imports: import unittest
  import numpy
  import torch
  from opacus.utils.uniform_sampler import DistributedUniformWithReplacementSampler
label_desc: Use image node_id 3 for calling the PoissonSamplingTest obj's underlying member method code with example usage: obj.test_length() without return types